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Water Efficiency Formula:
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The Water Efficiency Calculation according to Building Regulations determines the liters per person per day (lppd) consumption based on the number of fittings, their usage rates, and building occupancy. This helps ensure compliance with water efficiency standards in construction projects.
The calculator uses the water efficiency formula:
Where:
Explanation: The equation calculates the average daily water consumption per person by summing the total water usage from all fittings and dividing by the number of occupants.
Details: Accurate water efficiency calculation is crucial for sustainable building design, regulatory compliance, water conservation, and reducing environmental impact of construction projects.
Tips: Enter the number of water fittings, their daily usage rate in liters, and the building occupancy. All values must be positive numbers with occupancy at least 1.
Q1: What types of fittings should be included?
A: Include all water-consuming fixtures such as taps, showers, toilets, and appliances that use water in the building.
Q2: How is usage rate determined?
A: Usage rates are typically based on manufacturer specifications, standard values from building regulations, or measured consumption data.
Q3: What is the target lppd for compliance?
A: Target values vary by region and building type, but typically range from 110-125 lppd for residential buildings in many jurisdictions.
Q4: Can this calculator handle multiple fitting types?
A: This calculator provides a basic calculation. For multiple fitting types, you would need to calculate each type separately and sum the results.
Q5: How often should water efficiency be calculated?
A: Water efficiency calculations should be performed during building design, after any significant renovations, and when updating water systems.